package com.cb.dao.impl;

import com.cb.utils.JdbcUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

public abstract class  BaseDao {

    private QueryRunner queryRunner=new QueryRunner();

    public  int update(String sql,Object ... args){
        Connection connection = JdbcUtils.getConnecttion();

        try {
            queryRunner.update(connection,sql,args);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            JdbcUtils.close(connection);
        }
        return -1;
    }

    public <T> T queryForOne(Class<T> type,String sql,Object ... args){
        Connection conn=JdbcUtils.getConnecttion();

        try {
            return queryRunner.query(conn,sql,new BeanHandler<T>(type),args);
        }catch (SQLException e){
            e.printStackTrace();
        }finally {
            JdbcUtils.close(conn);
        }
        return null;
    }

    public <T>List<T> queryForList(Class<T> type, String sql, Object ... args){
        Connection conn=JdbcUtils.getConnecttion();

        try {
            return queryRunner.query(conn,sql,new BeanListHandler<T>(type),args);
        }catch (SQLException e){
            e.printStackTrace();
        }finally {
            JdbcUtils.close(conn);
        }
        return null;
    }

    public Object queryForSingleValue(String sql, Object ... args){
        Connection conn=JdbcUtils.getConnecttion();

        try {
            return queryRunner.query(conn,sql,new ScalarHandler(),args);
        }catch (SQLException e){
            e.printStackTrace();
        }finally {
            JdbcUtils.close(conn);
        }
        return null;
    }
}
